. >> reporter: 21-year-old naser abdo didn't want to fight in afghanistan, but sources say he was more than willing to cause bloodshed at home. after being arrested, he told officers he wanted to get even with the military and chose ft. hood because of the 2009 attack here where major nidal hasan allegedly killed 13 and wounded 30. he told them he wasn't going to target the military post, but a nearby restaurant popular with soldiers. he told them his plan was to set off two bombs, then shoot any survivors. police say the attack was imminent. >> we would probably be here today giving you a different briefing had he not been stopped. >> reporter: greg ebert is the man who stopped him. a former marine and police officer who works at this killeen gun store. he got suspicious when abdo arrived in a cab on tuesday, then bought six pounds of gun powder, three boxes of shotgun ammunition and a magazine for a semiautomatic pistol. he paid $250 in cash. >> when somebody comes in, especially to a business like this, and makes a purchase and doesn't know what he's buying, i'd be concerned about t